A new ordinance for “extraordinary events” put in place by the city of Charlotte, North Carolina, which is hosting the Democratic National Convention this week, have left attendees as well as protesters uncertain of what seemingly innocent possessions might be considered a cause for arrest.

Handguns and rifles, of course, are perfectly legal to carry openly under state law, although carrying a concealed weapon requires a permit. But people could face arrest for carrying water bottles, hair spray, socks, or magic markers.

The rules explicitly ban “handbags, backpacks, soda cans, drink coolers, scarves, bike helmets, baby strollers, and non-service animals” within the hundred-square-block event zone. But what about a “container or object of sufficient weight to be used as a projectile.” The Associated Press suggests that this could “include almost anything from an apple to an iPhone.”